Tillage Implements Performance and their Effects on Two Types of Soil in Khartoum Area

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Safia Abdel Moniem Elzain Alnahas
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University of Khartoum
An experiment was carried out during September 2006 at two different locations, the Demonstration farm of the Faculty of Agriculture, University of Khartoum at Shambat (fallow ridged sandy clay soil), and clay soil of Abu–halema project (15 Km north of Khartoum).The experiment was conducted to investigate and compare the effect of three types of tillage implements (Chisel plough, offset disc harrow, and ridger) on soil bulk density, porosity, soil aggregation stability, and soil resistance to penetration in the two different locations. At the same time to identify some field performance parameters: wheel slippage, fuel consumption rate and field efficiency of the three implements. All soil and field performance parameters were analyzed by using complete randomized block design. The results indicated no significant differences between the effect of tillage treatments on the soil bulk density in the sandy clay soil location, while they have significantly (p<0.01) affected the soil porosity, the soil aggregation stability and soil resistance to penetration. The ridger recorded the highest mean bulk density (1.33 gm/cm³), and the lowest mean porosity (48.23%) and resistance to penetration (4.2 Kg/cm²). The disc harrow gave the highest mean aggregation stability (35.63%) while the lowest value (30.64%) measured by the no-tillage treatment. In contrast to the disc harrow and the ridger, the chisel plough gave the over– all higher mean penetration resistance (9.0Kg/cm²).At the clay soil location, the tillage treatments did not record any significant differences on their effects on bulk density. Generally bulk density increased with depth while porosity was decreased. All the tillage implements significantly (p<0.01) decreased the aggregation stability of soil, the disc harrow recorded the lowest mean aggregation stability of (25.73%) compared to (56.34%) for no-tillage treatment. The implements performance parameters showed higher slippage, fuel consumption rates, and field efficiencies especially for chisel and ridger implements at sandy clay soil location. The disc harrow gave the highest field efficiency of (79.9%) at the clay soil location. The chisel plough demonstrated the highest wheel slippage (19.2%) and fuel consumption rate (15.7L/ha). The lowest slippage (10.4%) and fuel consumption rates (5.97 L/ha -1.06 L/hr) were recorded by the disc harrow.
A thesis submitted to the University of Khartoum in partial fulfillment for the requirement of the Degree of Master of Science in Agricultural Engineering
Agricultural Engineering Tillage Implements Soil University of Khartoum
Safia Abdel Moniem Elzain Alnahas, Tillage Implements Performance and their Effects on Two Types of Soil in Khartoum Area .- Khartoum : University of Khartoum, 2007 .- 88p. : illus., 28cm., M.Sc